The First Amended Complaint in Scocca was filed last week.
As for the Ninth Circuit not finding that the Second Amendment extends outside of the home they have had plenty of opportunities to say that it doesn't including US v Vongxay and Nordyke v King where that argument was explicitly made. In Vongxay, that was the central point of his argument. Last time I checked, Vongxay is still in jail and the Nordykes will be holding their gun shows in public, and in a government building at that.
You might also want to take a look at the numerous unpublished opinions on the Second Amendment by the 9th Circuit Court of Appeals. They are all applying historical context in their decision making.
As for my case being "meritless" as you call it, it is the only case in the 9th Circuit which is arguing that the US Supreme Court meant what it said in Heller and McDonald.
Regardless, the 9th Circuit Court of Appeals will shortly have the chance to see who has the better argument.